TY - JOUR A1 - Fischer, G. A1 - Nellesen, J. A1 - Anar, N. B. A1 - Ehrig, Karsten A1 - Riesemeier, Heinrich A1 - Tillmann, W. T1 - 3D analysis of micro-deformation in VHCF-loaded nodular cast iron by µCT JF - Materials science and engineering A N2 - The impact of very high cycle fatigue (VHCF) load conditions on the microstructure of specimens consisting of nodular cast iron is analyzed by means of micro-computed tomography (µCT) utilizing both monochromatic synchrotron radiation and polychromatic X-ray tube radiation. Using 3D µCT, the microstructure in the region of the smallest cross-sections of shouldered round specimens is imaged in different stages of the VHCF loading. By digital image correlation (DIC) of these tomograms strain fields are analyzed three-dimensionally. Strain levels in the range of a few percent were detected. It is proven that a localization of strain allows to predict the site of the crack which precedes and induces the macroscopic failure of the specimens. KW - VHCF (very high cycle fatigue) KW - µCT KW - Micro-computed tomography KW - Strain analysis KW - Nodular cast iron PY - 2013 DO - https://doi.org/10.1016/j.msea.2013.04.057 SN - 0921-5093 SN - 1873-4936 VL - 577 SP - 202 EP - 209 PB - Elsevier CY - Amsterdam AN - OPUS4-28533 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -